In recent years Wannon Water, in partnership with Deakin University, has fine-tuned its research into using goldfish to help reduce the costs and environmental impact of sewage treatment.

The application of aquaculture to sewage treatment has been pioneered by Wannon Water in western Victoria. 

Successful trials have shown that aquaculture can improve the quality of recycled water and reduce reliance on costly mechanical de-sludging.

Throughout 2010/11 more than 20,000 fish of several different species were monitored in experimental tanks at the Hamilton water reclamation plant.  The trials proved successful and goldfish, in particular, demonstrated that they can thrive by consuming and removing nutrients and sludge from sewage.  Based on this research, Wannon Water plans to commence using aquaculture as part of its sewage treatment process, initially at the Hamilton plant. 

Wannon Water plans to produce its own goldfish for use in this innovative project, and has recently commissioned a fish hatchery with the capacity to produce millions of young goldfish per year.  

Importantly, using goldfish as part of the sewage treatment process will cut carbon emissions and reduce operating costs.

This significant business efficiency saving contributes to Wannon Water’s commitment not to raise water and sewerage prices over the 2013-18 Water Plan regulatory period (other than for CPI adjustment).  In fact, Warrnambool’s sewerage service charge will be reduced by 2% for residential customers in the first year of Water Plan 3 (2013/14).

For more about our research and development programs, contact us.